We are looking into this workflow right now to see if it needs to be changed (if a lot of people are doing this by mistake). I believe there is already an Enhancement Request/Bug report for this. Please go to your Customer Portal and search ER's to vote for the one that applies to this behavior. (If you cannot find it, just file a new request.)

The lock symbol means that your access has been restricted. It appears when your subscription contact expires. (if that's coming as a shock to you, try going to 'register my products' on the portal home page and enter your solidworks serial number and version.